Injector



(Model.)

W. T. MESSINGER.

INJEGTOB..

No. 350,546. Patented Oct. 12, 1886.

Figi. y,

27 a a/l ai.

ZL I aj? 3 2199.5. 7; w

L lIIIIIIIIMH ff, w 7. MIM, L fh @l f f'/ c v Lf j of W i" CL, i 4:

. wf. @1W

' described.

UNITED STATE-sv f 'PATENT FFICE.

VILLIAM T. MESSINGER, OF CAMBRIDGE, MASSACHUSETTS.'

INJECTOR.`

To all `whom it may concern:

Be it knownthat I, WILLIAM T. MEssIN- GER, of Cambridge, county of Middlesex, State of Massachusetts, have invented an Improvement in Injectors, of which the following description, in connection with the accompany'- ing drawings, is a specificatiomlike letters on the drawings representing like parts.

My invention relating to injectors is shown embodied in an injectorof the class shown in Letters Patent No. 281,385, dated July 17, 1883, and No. 302,273, dated July 22, 188,4, having three nozzles, the first or rearmost of which is asteam -nozzle, and the second or intermediate one of which communicates with the water supply from which the water is raised or drawn bythe action ofthe jet of steam in the iirst nozzle, and the third or foremost of which nozzles also communicates with the supply of steam and acts upon the stream of water issuing from the second nozzle.

rlhe invention consists,partly,in a novel con-v struction of the devices controlling the flow of steam to the first and third nozzles, which are supplied'from a common steam-inlet passage, and also in details of construction of the overiiow-chamber, this part of the invention being applicableto other injectors besides those con taining three nozzles co-operating together, as The steam controlling mechanism operates to admit steam to the iirst nozzle for a short period of time before it is admitted to .the third nozzle, thus permitting the jet issuing from the first nozzle to produce avacuum in the water-chamber at the base of the second nozzle and raise the water thereto and deliver it from the second nozzle, and after the water is thus raised and delivered from the second nozzle the steam is admitted to the third nozzle, forcing the said stream of water from the latter or delivery nozzle of the injector with suiicient force to enter the boiler or overcome such other pressure as may be required. For convenience in description the injector will be spoken of as being in a vertical position, delivering the water from its lower end. The steam is admitted to a chamber at the upper end, whichchamber may be in direct communication with the first nozzle, and is also connected by suitablepassages in a case or shell surrounding the second nozzle, and the water-chamberwith the third nozzle. In the SPECIFICATION forming part of Letters Patent No. 350.546, dated October 12, 1886. y Application filed September 7, 1F85. Serial No. 176387. (Model.)

present invention the portion ofthe steamchamber connected with the casting .containing the second nozzle, and passages leading to the third nozzle, and also having rigidly connected with it thefrst nozzle," has a tapering internal bore leading toward lthe first nozzle, and also has ports leading laterally from the said bore to the passages around the second nozzle, thatlead to the third nozzle. A tapering valve scate'din the said internal bore controlsthe iiow of steam'through thelateral ports to the third nozzle, and the said tapering valve has an internal passage leading to the first nozzle. The said tapering valve may be called, for distinctiomthe secondary7 valve, as its operation depends upon that of another or main valve provided with asuitable valve stem and ^handle or operating device, and controlling the flow of steam tothe iirst nozzle. The main valve isso constructed that at the end of a considerable movement from its scat, during which movement steam is admitted to the first nozzle, it engages thesecondary ,valve and removes it from its seat, thus admitting steam to the third nozzle at the proper time. Both valves are thus controlled l and operated by a single valve-stem, and the movement of the main valve before the secondary valve is engaged occupies sufficient time to enable the steam passing throughthe iirst nozzle to raise the water so as to deliver asteady stream from the second nozzle, after which the steam is admitted to the third nozzle to force the said stream forward. E

Figure lis a longitudinal section of an injector embodying this invention, being shown with both valves closed; Fig. 2, a similar section on aplane at right angles to Fig. 1, showing a modified construction of theV valves, which are both open or in the'position occupied when theinjector is in operation; Figs. 3 and 4, transverse sections on linesx and y of Fig. l,respectively; and Figs. 5 and 6,'a side elevation and plan view of the secondary valve.

Steamis admitted into a steam-ehamber, a', formed partly in a casting, a, provided with an inlet-passage, a2, and closed at its upper' end by a bonnet, a, in which the stembof theV valves operates, the said stem being provided with a suitable handle, b', and having athreaded portion, b2, operating in a threaded passage in the bonnet a3, the unthreaded portion IOO of said stem passing through a suitable stuffing-box, a4. The casting ce, which forms a part of the steamchamber a', has connected with it,VV preferably by screw-threads a5, a casting, c, shown as connected by a coupling-nut, d, with the casting e, which is provided with a waterinlet passage, e, and has preferably made integral with it the second nozzle, e', leading from the water-chamber c2, which surrounds it and communicates with the passage e3, the said casting e also having an outer shell, which surrounds the water chamber e2, providing a space or passage, 0*, (see Figs. 2 and 4,) between it and the water-chamber, said passages extending from end to end of the easting c, and conveying steam to the third nozzle, f', in a casting, j', connected with the lower end of the casting e by a coupling-nut, d.

The casting c has screwed into it or otherwise connected with it the first nozzle, g, the orifice of which is opposite the mouth of the second nozzle, c', a jet of steam issuing from said nozzle g operating to produce a vacuum in the water-chamber e2 and' raise the water u thereto, and deliver the said Water in a stream from the nozzle c', in the usual manner. The casting c is provided with internal recesses, c, (see Fig. 3,) to receive a wrench ortool, so that it may be screwed tightly to the casting a, the two castings thus forming, practically, asingle piece, being made separately only for convenience in construction and to enable the coupling-ring d to be applied, said coupling-ring being placed over the casting c before the latv ter is connected with the casting a. The two connected castings a and cthus form the stean1 chamber a or portion controllincr the supply of' steam to the injector proper, which is all below the couplingnut d, and may berenioved from the steam-controlling portion by unscrewing the said nut. The portion c of the steanrchamber has an internal portion, c, having a tapering bore forming a passage leading'to the first nozzle, g, and the said portion c2 has a projection, c, fitting into a tubular recess, g, at the base of the piece which forms the first nozzle, g, and a packingring, k, of lead or other somewhat yielding material, is placed between the pieces c and g, so that when the latter are drawn together by the couplingnut d the packing-ring k is squeezed tightly between the parts c and g, making a steamtight joint between them. The casting c has a recess or passage, c, between its outer shell and the inner portion, c2, the said passage c* communieatingwith the spacesurrounding the first nozzle, and with the passages c4 in the casting e, leading to the third nozzle, and also communicating at its upper end through lateral ports c5 with the internal bore of the portion c2. A tapering plug, l1, is fitted to the tapering internal bore of the casting c, and when seated therein prevents the passage of steam from the chamber a to the ports c5, c", and et, leading to the third nozzle, f', the said tapering plug h constituting the secondary valve, which governs the admission of steam to the third nozzle,

and which, when raised from its seat, as shown in Fig. 2, permits the steam to flow through the said passages to the third nozzle. The secondary valve h is made hollow or provided with an internal passage, 71?, through which steam may pass to the first nozzle, g, while the said secondary valve is seated, and preventing the passage of steam to the third nozzle, f. The flow of steam through the said passa-ge h2 in the secondary valve to the first nozzle is controlled by the main valve 7'., connected with the valve-stem b, the said valve or its stem being provided with a shoulder, z, which, after the said valve has been moved a definite amount from its seat,will engage a collar, h, connected with the secondary valve h by a series of arms, h4, between which the steam passes 'from the steamcliamber into the passage through' the secondary valve, as indicated by the arrows, Fig. 1. As shown in Fig. 1, the valve i co-opcrates with a seat formed in the casting c,or it might be in the nozzleg,while in the construction shown in Fig. 2 the valve 'i co operates with a seat in theinterior of the secondary valve h. In' the construction shownin. Fig. 1 thepassage in the lower portion of' the secondary valve h is large enough to permit the shouldered portion of the valvestein to pass through it, the secondary valve being slipped over the upper end of the valve-ste1n before the handle b is fastened thereon, and when in the inj ector having a free movement between its seat in the casting c and the under side of the bonnet a, being normally retained on its seat by gravity as well as by the pressure of steam inthe chamber a. The portion bl of the valve-stem between the shoulder 'i' and the val ve proper, fi, in Fig. 1 is grooved or made star-shaped, as shown in Fig. 3, to engage and guide the secondary valve, and at the same ti me.permit the steam to iiow between the said stem and the internal bore of the secondary valve. In the construction shown in Fig. 2 the secondary valve cannot be slipped over the valve-stem; and it is consequently provided with a nut, 71;", which forms part of the collar hiengaged by the shoulder z" in lifting the secondary valve. Suitable space is left between the shoulder 13 and collar h3 when both valves are seated, so that in operating the valve-stem by the handle b to admit steam to the injector the main valve is `unseated, admitting steam to the first nozzle for a suitable length of time before the shoulder 1J reaches the collar 115 and unscats the secondary valve, admitting steam to the third nozzle, thus affording sufficient time for the lifting of' water to the chamber cl before the steam is admitted to the nozzle f.

The construction of the castings c and j' is substantially the same as in another application filed herewith, and the operation is substantially the same as in the patents hereinbefore referred to. rlhe said casting f constitutes a chamber around the nozzle f which chamber may have screwed within it a discl1arge-tube,

It, and is threaded at its outside to receive a -coupling-nut, by which a suitable nipple may IOO IIO

be connected with the said casting f, serving to 'receive the pipe which conveys the stream of liquid forced by the injector to the boiler or other point where it is to be used. 'The shell surrounding the nozzle. f is provided with a passage, f2, to which may be connected the usual waste-pipe,when the said shell is used as an overliow-chaniber, or to which inay be connected a waste-pipe containing a valve to per init the liquid to escape in starting the injector when no dischargetnbe is employed, 'and preferably when used as an overflow-chamber the shellj'will have connected with it a secondary overliow-ehamber, p, havin gapassage, 1)',leading from the interior of the shell f or main overow-ehamber, and terminating in a valve seat, p,controlled by a eheclcvalve operating in a chamber, p, provided with a cap or bonnet, p", having a guide. p5, for the stem p of the valve pl. Thus when liquid is discharged from the main overflow-chamber it passes through the passage p', raising the valve pl, and flows into the chamber pflwliich is provided with a discharging passage, ps, open to the atmosphere, but having its mouth over apassage, p, provided with screw-threads p10, or otherwise adapted to have a waste-pipe connected with it, so that the overflowing liquid will be carried off. By having lthe passageps open to the atmosphere, as shown, it can at once be seen whether' or not liquid is escaping from the overliow-ehaniber, and the cheek-valve p7 prevents the admission of air and dust to the interior ofthe injector when no liquid is escaping from the overllow-chamber.

l. In an injector having three nozzles, the first and third of which receive the steam or actuating Huid, and the intermediate one of which receives the liquid to be forced,a steamehaniber having an internal passage eoininunieating with the first nozzle, and a passage communicating with the third nozzle, and lateral ports connecting said passages, combined with a secondary valve seating in the internal passage,whiehcontrols theilowof iiuid through the lateral ports to the third nozzle,and is provided with an internal passage leading to the rst nozzle, and a main valve controlling the flow of fluid to the first nozzle and engaging and operating the secondary valve, substantially as described.

2. An injector comprising three nozzles, the first nozzle having a tubular recess atits base, combined with a steam-chamber having a projection entering the said recess, and packing interposed between the base of the first nozzle and the steani-chaniber,whieh latter is provided with an internal passage leading to the first nozzle, and a surrounding passage leading to t-he third nozzle, and lateral ports connecting said passages, a secondary valve seating in said internal passage and controlling the flow of iiuid through the said ports,and itself provided with a passage leading to the first nozzle, and a inain valve controlling the flow of iiuid to the first nozzle and engaging and operating the secondary valve,substantiall y as described.

3. In an injector, a niain oveiiowcliamber surrounding the mouth ofthe discharge-tube, combined with an external auxiliaryovertlowchamber having` a passage communicating with the main overflow-chamber terminating in a valve seat, a valve-chamber and valve above the said, seat, said valve-chamber being provided with a lateral outlet opening into the atmosphere, and a discharge-passage below the mouth of the said outlet, substantially as described.

In testimony whereof I have signed my name to this specilieation in the presence of two subscribing witnesses. i

- WM. T. MESSINGER.

Witnesses:

Jos. P. LIvnRMoRE,

H. P. BATES. 

